Note: If you have a maintenance contract, you will also be able to search for previous versions of the software, as well as the serial numbers and product keys. The serial number and the product key are easy to find. When you click on the arrow, the details of the software are shown. An arrow is shown in front of the name of the software. 3 1 Searching for serial number Once you have logged in to your Autodesk Account, you can search in the list of software (under All Products & Services ) for the software whose serial number you want to find.